T&G Flooring Bubbling

An engineered wood T&G floating floor was installed in basement 90 days ago. We dont have water leakage in the room, but a 3" length in one area and also a smaller area bubbled up, about 1 inch vertical in the worst places. This occurred about July 1. I think it started getting humid here ( > boston) -- maybe my imagination. But its been bubbled about 4 weeks.

So today I guessed where the floor was pressing against a wall and chiseled out a 1/8th inch x 2 inch section of floor - doesn't look like anything improved.

So I guess the question is... how do you pinpoint the problem area, and is expansion the only possible cause?

Q...

The wood flooring.. more correctly said... has buckled, not bubbled. In 2 spots.. with a non-buckled are between. As you look left or right along the board length from the buckled areas the buckling diminishes, eventually to flat.

Q

Neither. Ha. Here's why...

It's a square room but has a small " L " [a cheap bar] like coming 5' out from the wall with a 1 - ft wide end. The major buckling occurs about 1 foot in front and 2 ft to the left and right of the L's end.

The buckled area's proximity the " L " is why I guessed the problem was at the L. And I figure it only takes 1 inch to set off a buckling effect. Am I right here?

if its near the L that would lead me to believe that they didnt gap it probably and when it was installed there was little humidity and then when the humidity rose it expanded and buckled because of no gap at the L but that would be an educated guess.

q

When I opened up this 1 ft length there was 1/8 in gap across it, except for 2 inches which touched the wall. I opened up the gap.. and I bought a de-humdifier. Buckling still present, and the same amt.